Combustion tube oil burner



March M, 1950 T. A. QUART COMBUSTION TUBE OIL BURNER Filed Sept. 22, 1945 In wemwar TkwreAo Quart zi Afiarmey Patented Mar. 14, 1950 U lTED STATES PATENT OFFICE COMBUSTION TUBE OIL BURNER Thure A. Quart, Hartford; Conn. Application September 22, 1 945; $erial No.-617,989-

8 Claims. 1

This invention relates to oil burners of the'type extensively installed in ranges and similar heating structures. One object of the invention is to provide in simplified form comparatively few parts that may be readily assembled into an efiicient burner. Another object of the invention is to provide a novel arrangement of parts for directing air through heated passages to space where fuel combustion takes place. It is also an object of the invention to provide means whereby carbon deposits in the burner may be conveniently removed. With these and other objects in view the invention consists'in the novel form and arrangement of parts set forth in the following detailed description, illustrated in the accompanying drawings and defined in the appendedclaims.

In the drawings,

Figure 1 is a plan view of an oil burner em-- bodying my invention, certain parts being shown in section and others as partly broken away to reveal elements below, and

Figure 2 is a vertical sectional view.

Referring to the drawings, the oil burner, here illustrated as a single unit, includes the usual concentrically arranged combustion tubes which are associated at their lower ends with a supporting base comprising a fuel receptacle, said tubes being provided at the top with a cover or tube spacing plate. The perforated combustion tubes are here shown as four in number. Outermost tube 5 and innermost tube 6 inclose the intermediate tubes 1 and 8 thereby providing combustion chambers 9 and I0 separated by air chamber II and also forming central air chamber l2. It will be understood that more tubes may be similarly arranged to provide a unit (not shown) of greater heating capacity. To hold tubes 5, 6, l and 8 in suitably spaced concentric relationat their upper ends a grooved plate I3 is associated therewith and securely held in place as by spot welding. This plate has suitable openings in register with combustion chambers 9 and I0 and serves also as a closure for air chamber II and the central air chamber l2 except for certain limited openings provided for a purpose that will be hereinafter particularly set forth. For convenience in lifting the tubes as a unit from a supporting base a handle !4 is attached to plate l3.

Specifically a base such as embodied in my invention comprises an annular fuel receptacle having the fiat bottom wall l6 and upstanding walls I! and I8 which respectively have offset portions to form shoulders l9 and 20. Above 2, these shoulders are respective wall portions 21 and 22'. Shoulder l9serves to support the outer most combustion tube 5 which is located concentrically to the base by peripheral contact with wall portion 21 and shoulder serves to support innermost tube 6 which is located concentrically to the base by peripheral contact with wall portion 22. For supporting the intermediate tubes 1 and 8 an annular plate 25 is provided having upstanding offset radial lugs 26 which are; attached to the outer combustion tube 5 as by spot Welding at 21, or the lugs the outer combustion tube 50 that plate 25' is V suitably located thereby. An intermediate-partof each of these lugs 26 is bent to form anupstanding Wall 26, and between this wall and the lower rim of tube 5 a space 28 is formed for reception of the upper edge of a wick 29 which is held. in an upright position beneath the combustion chamber 9 by engagement with wall I! of the fuel receptacle i5 andwalls 26 presented by lugs 26. In other words said radial lugs 26 present upright portions 26' which are oiT-set to cooperate with wall I! of the fuel receptacle I5 in forming support for wick 2-9. For concentrically locating and spacing tubes l and 8 on plate 25 th latter has formed therein a concentric bead 30- which provides shoulder 31 for engagement with tube 1 and a shoulder 32 for engagement with tube 8'. For conducting air from cemtral air chamber I2 to air chamber llconduits 33 are secured in suitable openings in tubes. 6'

and 8. Means for supplying oil to the fuel receptacle [5 include the 36 and 31 the latter being threaded into the. bot

tomof the fuelreceptacle through reinforcement collar 38. Preferably, although not necessarily,

fuel receptacle i5 is provided with a supplemental bottom plate 39 that is conveniently removable for cleaning therefrom carbon deposit such as is prone to gather at the base of oil burner combustion tubes. This plate 39 isannular in shape and slightly dished to form a shallow trough to receive a suitable level of oil delivered through duct 40 which registers with a hole- H in plate 39. For providing additional support to annular plate 25 and serving also to conduct heat thereto to improve vaporization of fuel, studs 4-2 are secured at intervals to bottom plate 39, said studs being arranged to engage the plate between side walls of bead 30.

plate 25 supported by these studs any bond-as-by spotwelding of lugs 26- to outer combustion tube" 5 is unnecessary and in this event said lugs wherethey engage tube 5 simply serve to locate the 26 may merely engage Obviously with= plate concentrically to tube 5. In the event that a wick is desirable for combustion chamber It], means for supporting such a wick as 43 are shown as reversely bent strips forming clips 44 which are spot welded as at 45 to supplemental bottom plate 39.

Any suitable support may be provided for the burner assembly thus far described. As shown a spider 66 secured to fuel receptacle i is reinforced with a hub 41 which has a threaded hole to receive set screw 48 by which said hub is adjustably secured to the usual standard 49. As before stated the burner illustrated is of the type commonly installed in ranges. When thus installed, open space in a fire box around the base of the burner may need to be closed off as by a baffle plate to thereby confine upward draft of air from beneath the burner to air chamber l2. For supporting such a plate as '50, lugs 5! are secured at suitable intervals around the outside wall of fuel receptacle l5. These lugs it will be noted form the sole support of the baffle plate, so that the matter of properly locating said plate in a range together with the burner may be simply accomplished.

Referring again to cover plate it it will be noted that it is provided with holes 52 above air chamber H and with hole 53 above air chamber i2. These holes are arranged and proportioned in size to provide vent openings suitable to induce flow of air into lower parts of air chambers H and i2 when space surrounding the base of the burner is closed or partially closed as by bafile plate 50.

The operation of the burner is as follows: Oil admitted to fuel receptacle l5 saturates wicking 29 and 43. The wicks are then ignited to produce heat for turning the oil into vapor. This vapor rises into the combustion chambers where it mixes with air received from the air chambers through the combustion tube perforations, the resulting mixture being effective for efficient combustion.

Having thus described my invention, what I claim is:

1. A liquid fuel burner having in combination, an annular base comprising a flat bottom wall merging into upstanding outer and inner Walls to form a fuel receptacle, each of said upstanding walls having an offset to form a shoulder adjacent to its top, perforated combustion tubes supported respectively on the shoulders of the outer and inner walls, an annular plate having radial lugs whereby said plate is secured to the outer combustion tube and located above the fuel receptacle, upright portions of said lugs below their attachment to the combustion tube being offset, an annular wick adapted to be engaged on its outer and inner faces respectively by the outer wall of the fuel receptacle and the offset,

portions of said radial lugs 0f the annular plate, said plate having shoulders formed thereon concentric with the annular base, and intermediate perforated combustion tubes supported by the annular plate and located by respective shoulders thereon.

2. A liquid fuel burner having in combination, an annular base comprising a fiat bottom wall merging into upstanding outer and inner walls to form a fuel receptacle, each of said upstandingwalls having an offset to form a shoulder adjacent to the top thereof, perforated combustion tubes supported respectively on the shoulders of the outer and inner walls, an annular plate located concentrically by and with respect to the outer combustion tube, said plate having shoul-' ders formed thereon concentric with th annular base, intermediate perforated combustion tubes supported by the annular plate and located by certain of the shoulders thereon, a removable supplemental bottom plate freely supported by and contiguous to the bottom wall of the fuel receptacle and substantially coextensive therewith, and studs secured to said bottom plate and exending therefrom into contact with the annular plate.

3. A liquid fuel burner having in combination, an annular base comprising a flat bottom merging into upstanding outer and inner walls to form a fuel receptacle, each of said upstanding walls having an offset portion therein to form a shoulder adjacent to the top thereof, perforated combustion tubes supported respectively on the shoulders of the outer and inner walls, an annular plate having radial lugs whereby said plate is secured to the outer combustion tube and located above the fuel receptacle, upright portions of said lugs below their engagement with the combustion tube being offset, an annular wicl; adapted to be engaged on its outer and inner faces respectively by the outer wall of the fuel receptacle and the offset portions of said radial lugs of the annular plate, said plate having shoulders formed thereon concentric with the annular base, intermediate perforated combustion tubes supported by the annular plate and located by certain of the shoulders thereon, a removable supplemental bottom plate supported by and contiguous to the bottom wall of the fuel receptacle and substantially coextensive therewith, and studs secured to said bottom plate and extending therefrom into contact with the annular plate.

4. A liquid fuel burner having in combination, an annular base comprising a, flat bottom merging into upstanding outer and inner walls to form a fuel receptacle, each of said upstanding walls having an offset portion to form a shoulder adjacent to the top thereof, perforated combustion tubes supported respectively on the shoulders of the outer and inner walls, an annular plate having radial lugs whereby said plate is secured to the outer combustion tube and located above the fuel receptacle, said plate having shoulders formed thereon concentric with the annular base, an annular wick adapted to be engaged on its outer and inner faces respectively by the outer wall of the fuel receptacle and lugs of the annular plate, a removable supplemental bottom plate supported by the bottom wall of the fuel receptacle and substantially coextensive therewith, intermediate perforated combustion tubes supported by the annular plate and located by certain of the shoulders thereon, to thereby form alternate air and combustion chambers between the tubes, and means on the removable supplemental bottom plate for supporting a wick beneath certain of said combustion chambers.

5. A liquid fuel burner having in combination, a a base comprising an annular substantially flatbottomed fuel receptacle, a removable supplemental bottom plate supported by the bottom wall of the fuel receptacle and substantially coextensive therewith, studs secured to said bottom tube supported in peripheral contact with the inner wall of the fuel receptacle.

6. A liquid fuel burner having in combination, a base comprising an annular substantially flatbottomed fuel receptacle, a removable supplemental bottom plate supported by the bottom wall of the fuel receptacle and substantially coextensive therewith, studs secured to said bottom plate and extended upwardly therefrom, an annular plate supported by said studs, said plate having concentric shoulders formed therein and outwardly extended radial lugs, a perforated combustion tube supported by said lugs in peripheral contact with the outer wall of the fuel receptacle, intermediate combustion tubes supported on the plate and located by the concentric shoulders thereof, an innermost perforated combustion tube supported by the inner Wall of the fuel receptacle to thereby form an innermost combustion chamber, an annular wick, and clips on the removable plate for supporting the wick beneath the innermost combustion chamber.

7. A liquid fuel burner having in combination, an annular base comprising a fiat bottom wall merging into upstanding outer and inner walls to form a fuel receptacle, each of said upstanding walls having an offset to form a shoulder adjacent the top thereof, perforated combustion tubes supported respectively on the shoulders of the outer and inner walls, an annular plate having radial lugs whereby said plate is concentrically located with respect to the outer combustion tube, studs interposed between the bottom of the fuel receptacle and the annular plate for supporting the latter, said plate having shoulders formed thereon concentric with the annular base, and intermediate perforated combustion tubes supported by the annular plate and located by respective shoulders thereon.

8. A liquid fuel burner having in combination, an annular base comprising a flat bottom wall merging into upstanding outer and inner walls to form a fuel receptacle, each of said upstanding walls having an offset to form a shoulder adjacent the top thereof, perforated combustion tubes supported respectively on the shoulders of the outer and inner walls, an annular plate having radial lugs whereby said plate is concentrically located with respect to the outer combustion tube, upright portions of said lugs below their engagement with the combustion tube being offset, an annular wick adapted to be engaged on its outer and inner faces respectively by the outer wall of the fuel receptacle and the offset portions of the radial lugs of the annular plate, said plate having shoulders formed thereon concentric with the annular base, intermediate perforated combustion tubes supported by the annular plate, and supporting studs interposed between the annular plate and the bottom of the annular base.

THURE A. QUART.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,254,209 Daines Jan. 22, 1918 1,851,919 Neumann Mar. 29, 1932 1,878,836 Fowler Sept. 20, 1932 1,933,902 Golon Nov. 7, 1933 1,961,072 Newberry et al May 29, 1934 2,029,741 Schroeder et al Feb. 4, 1936 2,047,303 Albree July 14, 1936 2,064,081 Quart Dec. 15, 1936 2,375,347 Castle et a1. May 8, 1945 

